Waterproof portland cement and process of making it.



UNITED STATES PATENT OFFICE.

MAXIMILIAN TOCH, OF NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF TO HENRY M. 'IOCH, OF NEW YORK, N. Y.

WATERPROOF PORTLAND CEMENT AND PROCESS OF MAKING IT.

N 0 Drawing.

To all whom it may concern:

Be itknown that I. l\L-\XI3IILIAN T0011, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in \Yaterproof Portland Cement and Processes of Making It, of which the following is a specification.

According to this invention finely-divided absorptive aluminum silicate impregnated with a water-insoluble organic-acid amid or ammonia com )ound is admixed in small mmtland cement. enabling the cement to be use or e 1)1'O( action of concrete structures which are impermeable to water, even under high pressure.

When monocarboxylic acids or their glycerids, fatty acids, fats and oils, are subjected to the action of anhydrous ammonia, they react with the ammonia to produce amids or ammonia compounds of higher meltingpoint and greater hardness.

In order to utilize these amids for the production of waterproof cement, I prefer ably employ as a carrier one of the highlyabsorptive finely-divided aluminum silicates which occur in nature as for example fullcrs earth or o iennan terre verte. An a imum s1 mate of proper absorptive quality will take up a one-percent. solution of the anilin dye known as malachite green. In carrying out the invention, I saturate the alulllilwmfilgw with from eight to twelve percent. of tie organic acid or glyceri for example with lard oil, cotton-seer oil or linseed oil, and subjectv the mixture 0 tie umes of anhydrous ammonia. The conversion into an amid can be more rapidly effected under pressure, as in an autoclave, but in practice it is suflicient to thoroughly agitate the materials in a mixer or tumbling-barrel. Any free fatty acid which is not combined with ammonia is then neutralized with hydrated lime. I have found that from one and one-half to three percent. of the amid-impregnated aluminum silicate is av suitable amount to add to commercial Portland cement to give Specification of Letters Patent.

Application filed September 21, 1911.

Patented June 18, 1912.

Serial No. 650,546.

it waterproof qualities, this proportion not interfering with its setting.

I claim:

1. Vaterproof cement, containing a water-insoluble organic ammonia. compound.

2. Vaterproof cement, containing a water-insoluble fatty-acid amid.

3. \Vaterproof cement, containing a water-insoluble fatty-acid amid and a finelydividcd mineral carrier therefor.

-.t. \Vaterproof cement, containing a water-insoluble fatty-acid amid and a finelydivided aluminum silicate carrier therefor.

5. An ingredient for waterproofing cement, comprising a fatty-acid amid and a finely-divided mineral carrier therefor.

C. An ingredient for waterproofing cement, comprising a fatty-acid amid and a finely-divided aluminum silicate carrier therefor.

7. The process of producing a material for waterproofing cement. which consists in impregnating a finely-divided mineral carrier with an organic acid ammonia compound.

8. The process of producing a. material for waterproofing cement, which consists in impregnating finely-divided aluminum silicate with a fatty-acid amid.

9. The process of producing a material for waterprofing cement, which consists in impregnating highly-absorptive finely-divided aluminum silicate with a monocarboxylic acid or its glycerid, and reacting thereon with ammonia.

10. The process of producing a material for waterproofing cement, which consists in impregnating highly absorptive finely divided aluminum silicate with a monocarboxylic acid or its glycerid, reacting thereon with ammonia, and neutralizing any uncombined fatty acid.

In testimony whereof I aflix my signature in presence of two witnesses.

MAXIMILIAB TOC H.

Vitnesses:

HARRY E. Barn, ARCHIBALD C. REID.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

